JP2006037588A - Opening/closing device and its mounting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an opening/closing device having simplified lower-cost construction with a less number of parts and less assembling man-hours by improving the shape of a body case of a device body to omit a hinge case and a bracket. <P>SOLUTION: An upward opening bottomed cylinder part 9 is integrally formed in part of the plastic body case 2 of the device body 1 and a pair of bearings 10, 11 opposing each other are integrally formed at the opening upper end of the bottomed cylinder part 9. A cam member 19 having a sliding protrusion 19a is pivotally mounted between the bearings 10, 11 rotatably around a hinge pin 12. A slider 17 having a cam abutting face 16 for abutting on the sliding protrusion 19a is housed in the bottomed cylinder part 9 slidably up and down. A spring member 18 is housed therein for energizing the slider 17 to be pushed up at all times. Since the slider 17 and the spring member 18 are housed directly in the bottomed cylinder part 9 integrally formed in the body case 2, assembling work can be done with a less number of parts and less assembling man-hours. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an opening / closing device suitable for an opening / closing mechanism of an opening / closing body in a printer / scanner multifunction device and a method of attaching the opening / closing device.

  Conventionally, in this type of opening and closing device, for example, as shown in FIGS. 7 and 8, a fixed-side hinge body 31 attached to the apparatus main body 30 such as a printer, and can be opened and closed in the vertical direction with respect to the apparatus main body 30. And a movable-side hinge body 33 attached to the rotation base end side of the opening / closing body 32 such as a scanner installed in (see, for example, Patent Document 1).

As shown in FIG. 8, the fixed-side hinge body 31 is formed separately from the apparatus main body 30, and has a hinge case 34 formed in a bottomed cylindrical shape, and is opposed to the upper end of the opening of the hinge case 34. A slider 37 (referred to as a “wedge body” in the above-mentioned document 1) having a cam contact surface 37a at its upper end is slidable in the hinge case 34. And a compression coil spring 38 that constantly pushes and urges the slider 37 upward to apply a moment in the opening direction to the movable hinge body 33 against the moment in the closing direction due to the weight of the opening / closing body 32. It is.
On the other hand, the movable-side hinge body 33 protrudes from a cam member 40 pivotally mounted around the hinge pin 39 between the pair of bearings 35, 35 and a part of the outer periphery of the cam member 40, and opens and closes. As the body 32 is opened and closed, it has an arcuate protrusion 40a that slides on the cam contact surface 37a and applies a rotational torque in the opening direction to the movable hinge body 33. According to the above opening / closing device including the fixed side hinge body 31 and the movable side hinge body 33, the opening direction moment generated by the cam member 40, the compression coil spring 38 and the slider 37, and the dead weight of the opening / closing body 32. The opening / closing operation of the opening / closing body 32 can be simplified by the balance with the moment in the closing direction, and the opening / closing body 32 can be stopped and held at an arbitrary opening angle position.

Japanese Patent Laid-Open No. 2001-9839 (FIGS. 1 and 6)

  In the opening / closing device, the fixed-side hinge body 31 is provided with a bottomed cylindrical hinge case 34 that accommodates the slider 37 and the compression coil spring 38. As shown in FIG. The bracket 41 is attached. However, in the method of attaching the fixed side hinge body 31, members of the hinge case 34 and the bracket 41 are required, an assembling process for integrally connecting the hinge case 34 to the bracket 41, and the bracket 41 to the apparatus main body 30. Since an assembling process for fixing is required, the number of members and the number of assembling steps are increased, and the cost is increased accordingly.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a fixed-side hinge body in a switchgear having a fixed-side hinge body and a movable-side hinge body as described above. An opening / closing device and its mounting method capable of omitting hinge cases and brackets, etc. by improving the shape of the main body case of the device main body to be mounted, simplifying the structure, reducing the number of members and assembly steps, and reducing costs It is to provide.

  In order to achieve the above object, an opening / closing device of the present invention is configured such that an opening / closing body is attached to a plastic main body case of the device main body via a hinge member so as to be capable of opening and closing, and the hinge member is attached to the main body case side. A fixed-side hinge body that is attached, and a movable-side hinge body that is attached to the rotation base end side of the opening / closing body, the movable-side hinge body projecting downward from the cam member. The fixed-side hinge body includes a slider having a cam contact surface that contacts the sliding protrusion at an upper end, and a spring member that constantly urges the slider upward. The opening / closing body is stopped and held at an arbitrary opening angular position by a balance between the opening direction moment generated by the cam member, the compression coil spring and the slider and the closing direction moment due to the weight of the opening / closing body. In the opening / closing apparatus configured to be capable of forming, a part of the main body case is integrally formed with an open bottomed cylindrical part, and a pair of bearings facing each other is provided at the upper end of the bottomed cylindrical part. The slider is housed in the bottomed tube portion so as to be slidable in the vertical direction, the spring member is housed under the slider in the bottomed tube portion, and the cam member. Is characterized in that it is pivotally mounted around the hinge pin between the bearings.

  In order to achieve the above object, the method for mounting an opening / closing device according to the present invention is such that an opening / closing body is attached to a plastic main body case of the device main body via a hinge member so that the opening / closing rotation is possible. A fixed-side hinge body attached to the case side; and a movable-side hinge body attached to the rotating base end side of the opening / closing body, the movable-side hinge body protruding downward from the cam member The fixed-side hinge body includes a slider having a cam contact surface that contacts the sliding protrusion at an upper end, and a spring member that constantly urges the slider upward. The opening / closing body is arbitrarily opened by a balance between the moment in the opening direction generated by the cam member, the compression coil spring and the slider and the moment in the closing direction due to the weight of the opening / closing body. An opening / closing device mounting method capable of being stopped and held in place, wherein an upper open bottomed cylindrical portion is formed integrally with a part of the main body case, and an upper open end of the bottomed cylindrical portion In addition, a pair of bearings facing each other are integrally formed, and the slider is accommodated in the bottomed cylindrical portion so as to be slidable in the vertical direction, and the slider is always pushed upward and biased. The spring member is housed, and then the cam member is pivotally mounted around the hinge pin between the bearings, and then the cam member is integrally attached to the opening / closing body.

  According to the opening / closing device and the mounting method of the above configuration, since the slider and the spring member are accommodated directly inside the bottomed cylindrical portion integrally formed in the plastic main body case on the device main body side, The hinge case and bracket that are separate from the main body case such as the conventional switchgear can be omitted, and the assembly process or bracket for integrally connecting the conventional hinge case to the bracket An assembling process for fixing to the substrate becomes unnecessary. The slider and the spring member can be assembled by a simple and quick operation by simply storing the slider and the spring member by dropping them into the bottomed cylindrical portion integrated with the main body case on the apparatus main body side. Therefore, the number of members and assembly man-hours can be reduced and the cost can be reduced, which is advantageous.

  In addition, the pair of bearings that rotatably support the cam member around the hinge pins are also integrally formed in the plastic main body case on the apparatus main body side, so that assembly of the bearings to the main body case can be omitted. it can.

  According to the mounting method of the switchgear having the above configuration, the slider, the spring member, and the cam member are assembled on the apparatus main body side, and then the switchgear is opened and closed to the apparatus main body with a few assembly steps only for mounting the switchgear on the cam member. Can be pivotally mounted.

  A preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an external perspective view of a multifunction machine equipped with an opening / closing device according to an embodiment of the present invention as seen from the front side, FIG. 2 is a rear view of the multifunction machine of FIG. 1, and FIG. FIG. 4 is a cross-sectional view corresponding to FIG. 3 showing the open state of the scanner of the multifunction machine of FIG. 1, FIG. 5 is a perspective view of the exploded state of the multifunction machine of FIG. It is the perspective view which looked at the decomposition | disassembly state of the switchgear part in FIG. 5 from the front side.

  Hereinafter, an embodiment in which the opening / closing device according to the present invention is applied to a printer / scanner multifunction device will be described with reference to FIGS. 1 and 2, reference numeral 1 denotes an example of an apparatus main body of the present invention, a printer / scanner multifunction printer, and 2 a plastic main body case of the printer 1, which is not shown in the drawing, Built-in head and ink cartridge. Reference numeral 3 denotes a scanner, which is an example of the opening / closing body of the present invention, and is mounted on the printer 1. The scanner 3 includes a document cover 4 that can be opened when the scanner 3 reads a document, and the entire scanner 3 including the document cover 4 can be opened when an ink cartridge is installed or replaced, or when a paper jam occurs. 1, an opening / closing device 5 of the present invention is attached so as to be capable of opening and closing.

  As shown in FIGS. 3, 5, and 6, the opening / closing device 5 attaches the scanner 3 to the plastic main body case 2 of the printer 1 via a hinge member 6 so as to be opened and closed. The hinge member 6 includes a fixed-side hinge body 7 attached to the main body case 2 side and a movable-side hinge body 8 attached to the rotation base end side of the scanner 3.

  As shown in FIG. 6, an upper open bottomed cylindrical portion 9 is integrally formed on a part of the upper wall of the plastic main body case 2 to which the fixed-side hinge body 7 is attached, simultaneously with the plastic molding of the main body case 2. A pair of bearings 10 and 11 facing each other are integrally formed at the upper end of the opening of the bottomed cylindrical portion 9. The pair of bearings 10 and 11 are provided with pin holes 13 and 14 through which the hinge pins 12 are inserted, and the rear ends of the bearings 10 and 11 are connected together by a back plate 15. Forming.

  As shown in FIGS. 3 and 6, the fixed-side hinge body 7 includes a slider 17 in which a cam contact surface 16 having a forward descending slope shape is integrally formed at the upper end, and a spring member 18 made of a compression coil spring or the like. The spring member 18 is dropped into the inside from the upper end of the opening of the bottomed cylindrical portion 9 and accommodated, and the slider 17 is slidable in the vertical direction above the spring member 18 and is always moved upward by the spring member 18. It is stored so as to be pushed up and biased. As will be apparent from the following description, the spring member 18 has a strength that gives a moment in the opening direction to the movable hinge body 8 against a moment in the closing direction due to the weight of the scanner 3.

  On the other hand, as shown in FIGS. 3 and 6, the movable-side hinge body 8 includes a cam member 19 and a sliding protrusion 19 a that integrally protrudes downward from the cam member 19. A pin hole 20 through which the hinge pin 12 is inserted is provided in the cam member 19 so as to penetrate in the horizontal direction, and a female screw 22 into which an attachment screw 21 is screwed is provided vertically at the upper end surface. The cam member 19 intervenes between the bearings 10 and 11, and a strong pressing force is applied to the cam member 19, and the slider 17 is pushed down against the force of the spring member 18 by the sliding projection 19 a, thereby The pin hole 20 is aligned with the pin holes 13 and 14 of the bearings 10 and 11, and the hinge pin 12 is inserted into the pin holes 10, 20 and 11. As a result, the cam member 19 is pivotally mounted around the hinge pin 12 between the bearings 10 and 11, and the spring member 18 is compressed, and the slider 17 is always urged upward by the spring member 18. An assembled state is obtained in which the sliding projection 19a of the cam member 19 contacts the cam contact surface 16 with a strong pressing force.

  After assembling the spring member 18 of the fixed-side hinge body 7, the slider 17, and the cam member 19 of the movable-side hinge body 8 on the main body case 2 side of the printer 1, as shown in FIGS. 3 and 5. The scanner 3 is placed on the printer 1 so that the mounting hole 24 provided in the upper wall portion of the recess 23 on the rotation base end side of the scanner 3 coincides with the female screw 22 of the cam member 19, and the mounting screw 21 is inserted. The rotation base end side of the scanner 3 is integrally attached to the cam member 19 by being inserted into the attachment hole 24 and screwed into the female screw 22 and tightened.

  Next, the operation of the opening / closing device 5 having the above configuration will be described with reference to FIGS. FIG. 3 shows a state diagram in which the scanner 3 is closed as in the case shown in FIG. In this closed state, the sliding protrusion 19 a of the cam member 19 of the movable side hinge body 8 is located at the upper end of the cam contact surface 16 of the slider 17 of the fixed side hinge body 7, and is closed due to the weight of the scanner 3. The magnitude of the moment in the direction and the magnitude of the moment in the opening direction generated by the force of the spring member 18 are balanced to maintain the closed state of the scanner 3.

  When the scanner 3 is opened upward around the hinge pin 12 from this closed state as shown in FIG. 4, the sliding projection 19a of the cam member 19 slides down the cam contact surface 16 of the slider 17 and the slider 17 17 is applied to the scanner 3 by a sliding contact between the cam contact surface 16 and the sliding projection 19a while being pushed up by the spring member 18. Therefore, the relatively heavy scanner 3 can be opened easily with a small opening operation force. Further, at an arbitrary opening angle at an intermediate position between the horizontal fully closed state and the vertical open state of the scanner 3, the magnitude of the moment in the closing direction caused by the weight of the scanner 3 and the magnitude of the moment in the opening direction caused by the force of the spring member 18. Sato can maintain balance and stop.

The opening / closing device 5 acting in this way integrally forms the bottomed tube portion 9 in the plastic main body case 2 of the printer 1, and when assembled, the slider 17 and the spring member 18 are directly inside the bottomed tube portion 9. As a result, it can be assembled with a small number of members and assembly man-hours. The pair of bearings 10 and 11 that support the cam member 19 so as to be rotatable around the hinge pin 12 are also integrally formed with the plastic main body case 2 of the printer 1, so that the bearings 10 and 11 are assembled to the main body case 2. The attachment can also be omitted.
Further, by adopting an attachment method in which the slider 3, the spring member 18, and the cam member 19 are assembled to the printer 1 side, and then the scanner 3 is attached to the cam member 19, the scanner 3 can be attached to the printer 1 with very few assembly steps. It can be easily attached to the door so that it can be opened and closed.

  In the above embodiment, the case where the present invention is applied to the scanner opening / closing mechanism of a printer / scanner multifunction device has been described. However, the opening / closing device of the present invention can be applied to other opening / closing mechanisms such as a document pressure plate of a copying machine as well. Needless to say.

It is the external appearance perspective view which looked at the compound machine provided with the opening and closing device which shows one example of the present invention from the front side. FIG. 2 is a rear view of the multifunction machine of FIG. 1. It is the sectional view on the AA line in FIG. FIG. 4 is a cross-sectional view corresponding to FIG. 3 showing an open state of the scanner of the multifunction machine of FIG. 1. It is the perspective view which looked at the decomposition | disassembly state of the multifunctional device of FIG. 1 from the back side. It is the perspective view which looked at the decomposition | disassembly state of the switchgear part in FIG. 5 from the front side. It is a side view of the opening / closing apparatus of a prior art example. It is a vertical side view which shows the open state of the opening / closing body of the opening / closing apparatus of a prior art example.

Explanation of symbols

1 Printer (Example of device main unit)
2 Body case 3 Scanner (an example of an open / close body)
DESCRIPTION OF SYMBOLS 5 Opening and closing device 6 Hinge member 7 Fixed side hinge body 8 Movable side hinge body 9 Bottomed cylinder part 10,11 Bearing 12 Hinge pin 16 Cam contact surface 17 Slider 18 Spring member 19 Cam member 19a Sliding protrusion

Claims (2)

An opening / closing body is attached to a plastic main body case of the apparatus main body via a hinge member so as to be capable of opening / closing rotation, and the hinge member is fixed to the main body case side. A movable hinge body attached to the base end side,
The movable-side hinge body includes a cam member and a sliding protrusion that protrudes downward from the cam member,
The fixed-side hinge body includes a slider having a cam abutting surface that abuts on the sliding protrusion at an upper end, and a spring member that constantly urges the slider upward.
Opening and closing that allows the opening and closing body to be stopped and held at an arbitrary opening angular position by a balance between the opening direction moment generated by the cam member, the compression coil spring and the slider and the closing direction moment due to the weight of the opening and closing body In the device
A part of the main body case is integrally molded with an open bottomed cylindrical part, and a pair of opposed bearings are integrally molded with the upper end of the bottomed cylindrical part,
The slider is housed in the bottomed tube portion so as to be slidable in the vertical direction, and the spring member is housed on the lower side of the slider in the bottomed tube portion,
An opening / closing device, wherein the cam member is pivotally mounted between the bearings so as to be rotatable around a hinge pin. An opening / closing body is attached to a plastic main body case of the apparatus main body via a hinge member so as to be capable of opening / closing rotation, and the hinge member is fixed to the main body case side. A movable side hinge body attached to the end side,
The movable-side hinge body includes a cam member and a sliding protrusion that protrudes downward from the cam member,
The fixed-side hinge body includes a slider having a cam abutting surface that abuts on the sliding protrusion at an upper end, and a spring member that constantly urges the slider upward.
An opening / closing mechanism that can stop and hold the opening / closing body at an arbitrary opening angle position by a balance between a moment in the opening direction generated by the cam member, the compression coil spring and the slider and a moment in the closing direction due to the weight of the opening / closing body. A method of mounting the device,
A part of the main body case is integrally molded with an open bottomed cylindrical part, and a pair of opposed bearings are integrally molded with the upper end of the bottomed cylindrical part,
The slider is housed in the bottomed cylindrical portion so as to be slidable in the vertical direction, and a spring member that constantly pushes and urges the slider is housed below the slider.
Next, the cam member is pivotally mounted around the hinge pin between the bearings,
Then, the cam member is integrally attached to the opening / closing body.

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